Hi folks, I’m looking for some recommendations on how to troubleshoot pants error like

ERROR: Could not find a version that satisfies the requirement PackageName==x.y.z

, where you can successfully run

pip install PackageName==x.y.z

. There is usually a lack of error message output. We get error message like

Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

, but because package is installed in a sealed environment, it’s unclear to me how to find the actual error logs (or is it already cleaned up by the time pants failed?)

Usually in these situations I use the

--keep-sandboxes

flag and

-ldebug

to see verbose output

in a lot of cases. this is because the python interpreter are not tight enough so pants try to resolve a version of the package for every python version that the interpreter constraints allow for. https://www.pantsbuild.org/docs/python-interpreter-compatibility

Thank you @wonderful-boots-93625 and @polite-garden-50641

Is the package when installed with pip, using the same 3.7, and not a pip belonging to a more recent python?